Use a modest increase such as 125% first for quiet audio, or reduce to 75% or 50% when loud peaks are uncomfortable or distort. Raising level also raises background noise, and it cannot repair a recording that was clipped when captured.
Adjust an audio file’s volume
Choose a percentage, process the file and compare the output at the same device volume.
What volume percentages mean
A percentage multiplies the audio signal. Values above 100% increase level; values below 100% reduce it. A 200% setting doubles sample amplitude, but perceived loudness does not increase in a simple one-to-one way.
Digital audio has a maximum ceiling. If increased peaks cross it, they can clip and sound harsh or crackly. Lowering volume after clipping does not restore the original waveform.
Background hiss, room noise and microphone hum rise with the wanted sound. Volume adjustment changes level, not recording cleanliness.
How to change audio volume with Mediaivo
- Find the quietest and loudest sections
Listen to both so one adjustment does not solve one part while damaging another.
- Choose a modest percentage
Start with 125% for an increase or 75% for a reduction, then process a test copy.
- Compare at fixed device volume
Do not change the phone, speaker or headphone volume between source and output.
- Check for clipping and noise
Listen to loud consonants, drums and peaks as well as quiet background sections.
Choose a sensible level adjustment
Use the smallest change that makes the recording comfortable and clear.
| Situation | Recommended choice | Check before publishing |
|---|---|---|
| Slightly quiet speech | 125% | Listen for stronger hiss and harsh consonants. |
| Clearly quiet but clean recording | 150% | Check the loudest phrase for clipping. |
| Very quiet source | 200% only as a careful test | Expect background noise to become much more noticeable. |
| Audio is too loud | 50% or 75% | Confirm it remains audible on normal speakers. |
How to judge the adjusted level
Compare source and output using the same headphones or speakers and the same playback volume. A fair comparison is impossible if the device level changes between files.
Check peaks for crackling, flattened impact or harshness. Then listen to a quiet gap. If noise becomes distracting, a smaller increase or proper audio restoration may be needed.
Common mistakes to avoid
1. Jumping directly to 200%
A large increase can clip peaks and make noise far more obvious.
2. Expecting volume to remove noise
The tool changes signal level; it does not separate speech from background sound.
3. Comparing at different device volumes
Keep playback hardware settings fixed to judge the file change accurately.
4. Trying to repair recorded clipping
Once a source waveform is clipped, lowering it makes the distortion quieter but does not reconstruct it.
Final check before downloading or publishing
- Speech is comfortably audible.
- No new crackling appears on peaks.
- Background noise remains acceptable.
- Left and right channels behave normally.
- The output is tested on the intended device.
Frequently asked questions
What does 125% volume mean?
The signal amplitude is multiplied by 1.25, producing a moderate level increase compared with the source.
Why did increasing volume add noise?
Background noise is part of the signal, so it rises along with speech or music.
Can lowering volume fix distortion?
It can make distortion quieter, but it cannot restore peaks that were clipped in the original recording.
Which percentage should I start with?
Try 125% for quiet audio or 75% for overly loud audio, then compare and adjust only if necessary.
Set a clearer, safer listening level
Make a modest change first and inspect both loud peaks and quiet background sections.